HMS Holdings Corp. is a holding company. The Company, through its subsidiaries, operates in the United States healthcare insurance benefit cost containment marketplace. The Company provides coordination of benefits services to government, and private healthcare payers and sponsors. The Company’s customers are government health agencies, including Centers for Medicare & Medicaid Services (CMS), the Veterans Health Administration (VHA) and state Medicaid agencies; commercial health plans, including Medicaid managed care, Medicare Advantage and group and individual health lines of business; government and private employers; child support agencies, and other healthcare payers and sponsors. As of December 31, 2014, the Company also provided services to approximately 220 commercial customers and supported their multiple lines of business, including Medicaid managed care, Medicare Advantage and group and individual health.